From single gaseous molecules through clusters and condensates to the building blocks of life A short tribute to Prof. Eugen Illenberger´s work in the field of negative ion chemistry Ilko Bald, Judith Langer, Petra Tegeder, Oddur IngólfssonInt. J. Mass Spectrom.,277 (2008) 4-25 (review article).# DOI: 10.1016/j.ijms.2008.06.013#